gh-105927: PyImport_AddModule() uses _PyWeakref_GET_REF() #106001
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vstinner
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brettcannon,
ericsnowcurrently,
ncoghlan and
warsaw
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It now raises an exception if sys.modules doesn't hold a strong reference to the module. Elaborate the comment explaining why a weak reference is used to create a borrowed reference.
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| Py_DECREF(ref); | ||
| Py_XDECREF(mod); | ||
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| if (mod == NULL && !PyErr_Occurred()) { |
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I am not sure that comparing mod with NULL after Py_XDECREF does not have an undefined behavior. AFAIK, you can do nothing with a pointer to released memory, not even compare it with NULL.
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See comments of my PR #105998: IMO most of this code is useless and can be removed.
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It now raises an exception if sys.modules doesn't hold a strong reference to the module.
Elaborate the comment explaining why a weak reference is used to create a borrowed reference.